21144880

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4987}}^1$

素因数の和:5053

約数の個数: 40

約数和(自身を含む): 50099472

約数和(自身を除く): 28954592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4987, 9974, 19948, 24935, 39896, 49870, 79792, 99740, 199480, 264311, 398960, 528622, 1057244, 1321555, 2114488, 2643110, 4228976, 5286220, 10572440, 21144880]

約数ペア:

[(1, 21144880), (2, 10572440), (4, 5286220), (5, 4228976), (8, 2643110), (10, 2114488), (16, 1321555), (20, 1057244), (40, 528622), (53, 398960), (80, 264311), (106, 199480), (212, 99740), (265, 79792), (424, 49870), (530, 39896), (848, 24935), (1060, 19948), (2120, 9974), (4240, 4987)]